a preliminary changelog for rc7

Changes so far in 0.0.9:

rc7:

  o Bugfixes on 0.0.9rc:

    - Fix a stack-trashing crash when an exit node begins hibernating.

    - Avoid looking at unallocated memory while considering which

      ports we need to build circuits to cover.

    - Stop a sigpipe: when an 'end' cell races with eof from the app,

      we shouldn't hold-open-until-flush if the eof arrived first.

    - Fix a bug with init_cookie_authentication() in the controller.

    - When recommending new-format log lines, if the upper bound is

      LOG_ERR, leave it implicit.

  o Bugfixes on 0.0.8.1:

    - Fix a whole slew of memory leaks.

    - Fix parse_iso_time on platforms without strptime (eg win32).

    - win32: tolerate extra "readable" events better.

    - win32: when being multithreaded, leave parent fdarray open.

    - Make unit tests work on win32.

rc6:

  o Bugfixes on 0.0.9pre:

  o Bugfixes on 0.0.9rc:

    - Clean up some more integer underflow opportunities (not exploitable

      we think).

    - While hibernating, hup should not regrow our listeners.